Abstract：In order to select a proper protective seam, firstly, in view of safety mining of high gas coal seams, the protective mechanism of protective seam mining was analyzed.Protective seam mining has pressure relief and a permeability-increasing function to a protected seam, and it can improve gas the drainage effect of a protected seam effectively.Thusly, protective seam mining is an important technique to solve gas disaster problems in high gas coal seams.Pressure relief is the key to solve the coal and gas outburst problems.In view of safe mining in high gas coal seams in a mine, the pressure relief effect of two protective seams mining was studied through FLAC3Dnumerical simulation method, and analysis and comparison have carried out.The results can provide a basis for the reasonable selection of a protective seam.

Keyword：high gas;coal seams;protective seam mining;stress-relief effect;